Oven for combination coal and gas ranges.



R. M. WITIVIAI.

ovEN FOR comm/mow coAL AND GAS RANGES.

APPLICATION FILED NOV. 5,1915. 1,191,379, Patented July 18, 1916.

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OVEN FOR COMBINATION COAL AND GAS RANGES.

APPLICATION FILED NOV- 5. |915.

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PATENT onirica.

ROBERT lVI. WITMAN, 0F EVANSVILLE, INDIANA, ASSIGNOR TO EVANSVILLE STOVEWORKS, OF EVANSVILLE, INDIANA,. A CORPORATION OF INDIANA.

Specification of Letters Patent.

Patented July 18, 1916.

Application'led November 5, 1915. Serial No. 59,775.

use in a combined coal and gas range so that all the advantages oftheuse of baking and broiling by the use of gas may be obtained withoutinterfering with the Aheating of the oven by coal whenever such heatingis preferred, the gas attachments being so constructed that they may beconditioned so they willbe out of the way when not in use.

Another object is to provide novel improvements, applicable to a gasrange alone or to -a combination coal and gas range, whereby gas may beconveniently used for baking or broiling, and to that end, I provide amovable burner carrying baffle which is constructed and mounted ina-novel manner so that it can be raised or lowered or set to be out ofthe way when gas is not to be used.

The invention also comprises a novel, duplex gas burner carried by amovable baille and also novel air and gas mixers positioned at upper andlower points of the oven adap'ted to deliver the gas mixture to theburner when the baffle is in raised or lowered position.

Further improvements comprised in the present invention are thearrangement of the burners on the baffle. and the relationship theretoof a lighting aperture or orifice; and a flue provided with a damper andwith an opening in the bottom of the oven to admit air to the ovenwhether used as a gas oven or a coal heated oven.

Other objects of the invention will appear more fully and at large fromthe following description of one embodiment of the different features ofthe invention, which, however, is to be considered as illustrative,rather than restrictive, of the scope of the invention, as modificationmay be resorted .to in carrying out the different inventive ideasembodied therein.

In the accompanying drawings: Figure 1 1s a front elevation with partsin section, the baffle being in its lower position; Fig. 2, a detailsection on line 2 2, Fig. 1; Fig. 3, a plan view of the baffle, dottedlines representing the burners; Fig. 4, a detail vertical section fromthe front to the rear of the oven, the baflie being in its lowerposition; Fig. 5, a detail plan, partly in section, of one of the duplexmixers; Fig. 6, a'front view of the same, showing the air dampers orvalves; Fig. 7, a horizontal section through the burner; Fig. 8, adetail view showing the enlargements of the header; and Fig. 9, adiagram of a modication.

In the drawings only so much of aV gas and coal range is shown as willgive a clear understanding of my improvements which relate solely to theoven 1. In thebottom of the oven is an aperture 2 which is one end of a{iue 3 leading to the side thereof and provided with a damper 4. Whenthe oven is heated by gas, the damper 4y is opened to permit air toenter the oven in suitable volume to aid in the combustion of the gas.When the oven is heated by coal, the damper 4 rwill be closed. At oneside of the oven in convenient position for manipulation and adjacentthe bottom and top thereof, are duplex gas and air mixers 5 and 6, eachof which is of the detailed construction shown in Figs. 5 and 6. Theseduplex air and gas mixers have two conduits or'inlets 7 and 8 providedwith the air regulating dampers or caps 9, commonly used in gasadmission fixtures. The conduits 7 and 8 converge t'oopposite sides of apartition 10 contained within the nipple 11 which is designed to enterthe end of the burner as will presently appear. For each of the inlets 7and 8 there is provided a gas admission cock 12 and' 13 enteringcentrally through the air regulating dampers 9. Means are thus providedwhereby a partial flow of gas Vand air may be introduced into theconduits 7 and 8, or into only one of them, or a full supply into both.

The baffle 14 is provided with studs 15 and 16 which are preferablyincased in rollers 17. The balile is also provided with lugs 18 at itssides, near its front edge. The duplex burner shown in detail in Fig. 7is connected to, and bodily carried by, the baffle 14, this burner beingsecured to the bottom face of the baille. The burner comprises duplexburner tubes 19 and 20, each having numerous perforations, as usual, andprovided with a central partition 21. The header 22 has a centralpartition 23 and a cross-partition 24. The partition 23 has aperforation or port 25. The partitions 21 run up to and join thepartition 23. In the region of the cross-partition 24, one portion ofthe header 22 is enlarged above and below, as at 26 and 27, to permitthe passage of the gas to the other burner 20. As shown by the arrows,Fig. 7, it will be apparent that gas entering` the compartment 28 of theheader 22, will How into the lefthand side of the burner 19 and therighthand side of the burner 21, and gas entering the compartment 29will only enter the right-hand Side of the burner tube 19 and theleft-hand side of the burner 20. The control of flow of the gas to theburner tubes 19 and 20 is accomplished by operating the valves 12 and 13and by this means either a small or a large degree of heat can beobtained. The nipples 11 of the respective duplex burners 5 and 6 arearranged to enter the end 30 of the header 22, according as the baiiie14 is in lowered or raised position, such nipples 11 being adapted tobear against a washer 31 within the nipple 30, and the partitions 10 and23 being arranged so that they will come into alinement when the burneris coupled to either one of the duplex mixers. Consequently, one of thevalves 12, for instance, solely controls the admission of gas and air tothe compartment 28 and the otherfvalve, say 13, controls the admissionof gas to the compartment 29.

To light the burners, there is provided an aperture 32 in the baiile 4,through which a match may be introduced after the gas has been turnedon.

Secured to the sides of the oven and projecting a slight distanceinwardly therefrom for the purpose of cooperating with the studs 15, 16and 18, are the supports 33, one being provided for each side of theoven and these being duplicates. Each support has two V-shaped guides ortracks 34 and 35, in which the studs 15, 16 and rollers 17 are adaptedto travel. The lower ends of these guides or tracks are disposedhorizontally at 36 and at the front there is provided a notched portion37 to receive the studs 18. At the tops of the supports 33 the guides 34and 35 open out and at the back there are provided the recesses 38 toreceive the studs 15, 16 and rollers 17. At the top and front there aretwo notches 39 and 40 into either of whichthe studs 18 may be entered.At the apices of the tracks 34 and. 35 horizontally enlarged orVextended parts of said guides are provided at 41 and 42.

When it is desired to use the gas burner for baking purposes, the lugs18 rest in the notches 37 and the lugs 15 and 16 in the horizontalextensions 36. When it is desired to place the bafie in the upper partof the oven, particularly for broiling purposes, the front edge of thebaiile is grasped and pulled outwardly in relation to the oven,whereupon the lugs 15 and 16 travel upwardly in the channels or guides34 and 35 until they reach the extensions or enlargements 41 and 42.'Then, vby a slight downward manipulation of the baflie and an inward andupward pressure, the lugs will enter the upper portions of the channels34 and 35 and afterward the baiiie can be pushed back until the rearlugs 15 enter the recess 38 and the lugs 16 rest on the part 43. Thelugs 18 will then enter the notches 39. The baille plate will thenremain securely in its raised position until it is desired to lower itagain for gas baking purposes.

The notches 40 are provided for the reception of the lugs 18 when it isdesired to broil with gas, but to get the baffle plate out of the way sothat the oven may be heated by coal, the baille is pushed back and thelugs 18 enter notches 39. When the bafiie is pulled forward and lugs 18enter notches 40, the nipple 11 of the upper mixing device 6 becomesconnected with the nipple 30, as the nipple 11 is long enough for thatpurpose. In its raised and lowered positions, the baille will be sodisposed that the nipple 30 will connect with the nipple'11 of eitherone of the upper or lower duplex mixers 6 and 5. The gas pressureprevents any leakage, as well known in gas fixtures. At pointsintermediate between the duplex mixers, the gas of the burner iscompletely disconnected from said mixers. y

In the modification shown diagrammatically in Fig. 9, the guidingsupports at the sides of the oven are duplex, being composed of thelower guides 44 and the upper guides 45. The upper air and gas mixer 6is located midway the height of the oven so that the baille 4 may bepositioned and sup ported for broiling with gas midway the height of theoven, as shown in full lines in said ligure, thus providing a smallerbroiling oven. The baflie 4 will be disposed in the upper dotted lineposition, out of the way, only when coal, wood or coke is used forcooking. In this form thedevice 6 need not be used at the top of theoven.

My improved duplex burner comprising the parts 19, 20, 22, as shown anddescribed, can be permanently attached to a gas range or oven when notused in a combination gas and coal range. In that event, the baiiie andmeans for guiding and supporting it could be dispensed with.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is 1. The combination with an oven, of a baffleslidable inwardly and outwardly in the oven and movable from a lower toa higher point in the oven, a gas burner-carried by, and bodily movablewith, said baille, and separate means for supplying gas to said burnerwhen in dierent positions in said oven, said burner being disconnectedfrom said gas supplying means when slid outwardly and also when beingmoved from one position to a higher or lower position in the oven.

2. The combination with an oven, of a baille movable from the bottom tothe top of the oven, a gas burner carried by, and bodily movable with,said baille, and gas supplying devices arranged and adapted toindependently connect with, or disconnect from, the burner when itis atthe lower and at a higher position in said oven, said burner beingdisconnected from said gas supplying devices when being moved from oneposition to another in said oven.

3.- In an oven, the combination with tracks or guides at the sidesthereof, of a movable baille, a gas burner carried thereby, means on thebaille adapted to travel in said tracks or guides, whereby the baillemay be arranged at the bottom or at a higher position in the oven andshifted from one position to the other and separate gas supplyingdevices arranged to independently connect with, or disconnect from, saidburner when the baille is in different positions in the oven.

4. In an oven,the combination with tracks or guides having branchesdisposed angularly to each other at the sides thereof, of a movablebaille, a gas burner carried thereby, and means on the baille adapted totravel in said tracks or guides, whereby the baille may be arranged atthe bottom or at Copies of this patent may be obtained for five centseach, by addressing the "Commissioner of Patents,

a higher position in the oven and shifted from one position to theother.

5. In an oven, the combination with substantially V-shaped tracks orguides at the sides thereof, of a movable baille, a gas L burner carriedthereby, and means on the baille adapted to travel in the V-shapedguides, whereby the baille may be disposed in lower or upper positionsin the oven by manipulation and will have its movements controlled bysaid guides when shifting from one position to another.

6. In an oven, the combination with a baille which is movable inwardlyand outwardly in said oven, of a burner carried thereby, and a gassupplying device with which said burner is adapted to connect when inone of said positions and from which it becomes detached when movedtoits other position.

7. In an oven,the combination with tracks or guides at the sidesthereof, of a baille, a gas burner carried by the baille, said baillehaving means adapted to engage said guides, whereby it may be disposedin upper or lower positions, means for retaining the baille in its lowerposition, and means for retaining the baille in pushed-in or pulledoutcondition when in its upper position.

8. In an oven, the combination with tracks or guides at the sidesthereof, of a baille, a gas burner carried by the baille, said baillehaving means adapted to engage said guides, whereby it may be disposedin upper or lower positions, and rests for retaining the baille in itslower and upper positions.

In testimony whereof, I hereunto aiiX my signature.

ROBERT M. WITMAN.

Washington, D. C.

